AI 149404: Am sending again with the latest changes

Publish Activity and Task Design Guidelines
  http://doog:9000/guide/practices/ui_guidelines/activity_task_design.html

Automated import of CL 149404

docs/html/guide/guide_toc.cs

@@ -148,6 +148,7 @@
           <ul>
             <li><a href="<?cs var:toroot ?>guide/practices/ui_guidelines/icon_design.html">Icon Design</a></li>
             <li><a href="<?cs var:toroot ?>guide/practices/ui_guidelines/widget_design.html">App Widget Design</a></li>
+            <li><a href="<?cs var:toroot ?>guide/practices/ui_guidelines/activity_task_design.html">Activity and Task Design</a></li>
           </ul>
       </li>
       <li><a href="<?cs var:toroot ?>guide/practices/design/performance.html">Designing for Performance</a></li>

docs/html/guide/practices/ui_guidelines/index.jd

@@ -22,12 +22,24 @@ The Icon Templates Pack is an archive of Photoshop and Illustrator templates and
 filters that make it much simpler to create conforming icons.</dd>
 </dl>
  <dl>
-  <dt><a href="widget_design.html">Widget Design Guidelines</a> </dt>
+  <dt><a href="{@docRoot}guide/practices/ui_guidelines/widget_design.html">Widget Design Guidelines</a> </dt>
   <dd>A widget displays an application's most important or timely information
 at a glance, on a user's Home screen. These design guidelines describe how to
 design widgets that fit with others on the Home screen. They include links to
 graphics files and templates that will make your designer's life easier.</dd>
 </dl>
+ <dl>
+  <dt><a href="{@docRoot}guide/practices/ui_guidelines/activity_task_design.html">Activity and Task Design Guidelines</a> </dt>
+  <dd>Activities are the basic, independent building blocks of applications.
+      As you design your application's UI and feature set, you are free to
+      re-use activities from other applications as if they were yours,
+      to enrich and extend your application.   These guidelines
+      describe how activities work, illustrates them with examples, and
+      describes important underlying principles and mechanisms, such as
+      multitasking, activity reuse, intents, the activity stack, and 
+      tasks. It covers this all from a high-level design perspective.
+</dd>
+</dl>